Steam-generating and water-heating device.



No. 655,065. Patentd luly 3|, I900. E. DETWILER. STEAM GENERATING ANDWATER HEATING DEVICE.

(Application filed. Dec. 8, 1899.) (No Model.) 2 ShaetsShaet l,

No. 655,065. I I. Patented July 3I IIJIIII. E. DETWILER.

STEAM GENERATING AND WATER HEATING DEVICE.

- (Application filed Dec. 8, 1899.) (No Model.) 2 Shaata$haet 2.

UNITED STATE PATENT OF'F'rcE.

EMANUEL DQETWILER, or MILWAUKEE, WISCONSIN,

STEAM-GENERATING ANDWATER-HEATING DEVICE.

SPECIFICATION forming part of Letters Patent No. 655,065, dated July 31,1900.

Application filed December 8, 1899. Serial No.739,608. (No model.) i

To all whom itmmty concern: Be it known that I, EMANUEL DETWILER, acitizen of the United States, and a resident'of Milwaukee, in the countyof Milwaukee and State of Wisconsin, have invented certain new anduseful Improvements in Steam-Generating and Water-Heating Devices; and Ido hereby declare that the following is a full, clear, and exactdescription thereof.

My invention relates to devices employed present invention, taken on theline 1 1 of Fig. 2 is a detail view illustrating the Fig. 3. exterior ofa valve forming part of said invention, said View being partlybrokenaway and partly in section on the line 2 ,2 of Fig.1. Fig. 3 is a viewof my improved device, partly in plan and partly in section on the line3 3 of Fig. 1, with portions of said device re moved and other partsbroken away to bet ter illustrate certain details of construction.

I will first describe my invention as arranged for the generation ofsteam, the arrangement being shown in detail in the accompanyingdrawings.

Referring to the said drawings, a represents the outer cylindrical orvertical wall, and h the inner inclined wall, of a doublewalled hollowannular casing A, closed at the upper end, as shown, by the annularhorizontal top wall 0. B represents a conical annular double-walled potsecured within said outer casing in any suitable manner. This pot has acentral vertical opening which is itself conical, sothat the describedannular walls of said pot converge from top to bottom, as shown, saidwalls coming together at the bottom on a roundedline, as shown at d, butbeing originally open at the top for the reception of theannularcoil-shell C, after which the top of the pot B is closed by the annulardome D, hereinafter described. The annular coil-shell O is preferablystamped out of sheet-copper and is likewise a conical double-walleddevice, the exterior surfaces of each of said walls of said shell beingformed with a continuous spiral coil, as shown at e and f, respectively,the outer edge of each spiral coil being formed with a continuoussemicircular groove to receive a continuous packing-cord g, and therebyinsure fluidtight joints when the annular coil-shell G has been drivento place within the annular pot B. The bottom of this double-walledshell is closed, as shown at'h h, but the top is left open, and incommunication with the upper part of the described annular pot B. Erepresents an annular conical band, likewise preferably stamped out ofsheet-copper, whose inner surface is formed with a similar continuousspiral coil t, the edge of said coil being formed with a continuoussemicircular groove for the reception of a continuous packingcord j, andthis annular conical bandE is inserted into the space between the wallsa b of the hollow annular casingA from the bottom and driven up to placeuntil the outturned upper edge of said band is in contact with the walla-of said casing and the spiral coil 1' incontact with the innerinclined casing-wall b, after which the said band E is made fast in anysuitable way, and then the lower end of the said annular casing A isclosed by a proper base-ring F.

The annular dome D, hereinbefore referred to, is semicircular incross-section and has a central opening and inner and outer baseflangesm n, which fit over and are properly secured to the inner and outerwalls of the described annular pot B and close the top of said pot. withtwo openings 0 0, guarded by collars p 19, having annular base-flangessecured to the exterior top of the dome, said collars being formed withinterior screw-threads;

Gis a conical shell open at the top, located in the central annularconical space of the pot B, said open top projecting above the plane ofthe top of said pot B, and the upper end of said shell G beingcylindrical and provided with exterior screwthreads. H, is 'ajcone whoseexterior surface is provided with a continuous spiral coil g, which isdriven up within the said shell G from the bottom thereof, so that theedge of said coil q may have a fluid- The said dome is further formed.

tight fit in said shell G, andafterthe said coil is properlysecured abase I is secured to the lower edge of the shell G, said base having aninlet pipe or passage J communicating with its interior and alsocommunicating with a pipe K, leading'from an opening in the adjacentinner wall of the pot B. L is another pipe, preferably in line with pipeK, extending between openings in the outer wall of. pot" B and the innerwall I) of casing A, and M is a drain-cock communicating with an openingin the lower part of the outer wall a of said casing A. M

N is'a cup or annular band of a generally ogee shape in cross-section,having a central openingwhosewalls constitute a short cylindric'al tube,as shown at 7', provided with interior screw-threads for engagement withthe threaded cylindrical upper end of the shell G,and said cup or band Nis further formed with two circular openings whose walls are thickenedand provided with interior screw-. threads, as shown at s s,-wherebywhen the said-cup or band N has been screwed to the said shell G thewalls of the said cup-openings will be in line with the describedcollars p p, whichsurround the openings 0 0 in the dome D.' The upperedge of the cup or band N terminates in a horizontal annular flange t. O0 represent sleeves formed with exterior screw-threads and upperexterior annular flanges, and when the openings in the dome D and cup orband N are in line with each other the said sleeves are screwed toplace, their threads engaging with the interior screwthreads in thecollars p and walls 8 of the openings in said cup or band N, thedescribed flanges on saidsleeves 0 bearing on the upper surface of saidcup or band and securing all these'parts firmly together, as shown inFig. 1. P represents another annular band which hasa base-flange u,fitting against and resting on the upper outer edge of the casing A, andan upper vertical flange n, which surrounds the flange t of the cup orband N at some little distance therefrom, so as to leave an annularspace between the two flanges.

Q is a dome,'.preferably of rounded shape andha'v'ing a base-flange wresting on the flange t of the cup or band N and secured thereto, as'byscrews 00, there being preferably a series'of angular lugs y yprojectinglaterally'froln the dome-flange w and engaging'with the flange c of theband P and secured thereto, as by screws z 2. R represents an outletextending from the center of said dome Q, said part B being shown ashaving also a small channel or passage 0" for the attachment of asteam-gage or safety-valve, as desired.

The outer wall aof the casing A is shown in Fig. 1 as provided at oneside with an opening a, which is surrounded by a frame 19, to which issecured a valve-block S, which like the frame is preferably rectangularin out- 7 line and has a slot 0" therethrough. The

valve-block has a" water-inlet channel cl, a

water-outlet channel e, (leading tothe space within the hollow annularcasing A,) and a 'water-escape channel f, none of which have any directcommunication with each other in the block S, but only through thewater-chamber g in the rocking valve T, which is pivotally secured tothe'block S by pivot h.

U is a rock-shaft extending transversely through the slot 0' in thevalve-block S and journaled in bearings z" j, the inner end of saidshaft projecting into the space in the hollow casing A between its wallsa b and above the top, of the conical band E, said projecting end havingrigidly secured thereto a float .V, while from the outer end of saidshaft U there projects downwardly an arm W, rounded atits lower end andin' engagement with a notch k" in the upper endof the valve T above itspivotal point.

X represents an inlet-pipe leading to the water-inlet channel d, and 'Yan escape-pipe leading from the water-escape channel f.

Z is a casing secured to the valve-block S by screws m mQwhich may alsopass through the frame b and into the casing A, and tho secure all theseparts togethera A- is a water-gage secured to the exterior of the casingA on the side opposite to the just-named valve-casing Z.

named parts are utilized, any desired form of pipe X into thewater-inlet channel d in the valve-block S, and thence passes throughthe water-chamber g in the valve '1 to andthrough the water-outletchannel e in said'block S into the space in the hollow casing A abovethe annular conical band E. The water then passes downward around thecontinuous spiral coil 1' of said band E to the bottom of the casing Aand through pipe L into the annular pot B and through pipes K J into theshell G, and thence passes-upward around the coils e and f in theannular pot B and the coil q in the shell G, and-when the water rises tothe desired level it will 'comeinto'contact with the described float Vand raise the latter, which will instantly rock the valve T through therock-shaft U, so as to close the water-outlet channel e and opencommunication through the water-chamber g in said valve between thewater-inlet channel d and waterescape channel f, so that any furthersupply of water from the pipe X will at once escape through the pipe Ywithout entering casing Aruntil suflicient of the water already in myfrom whence it is led by proper pipes to any' desired point, the heatedair in the annular passages between the inner wall of the casing A andthe outer wall of the pot B and between the inner wall of said pot B andthe shell G passing up between the band P and dome D and beneath the cupor band N and escaping outthrough the described annular space betweenthe flange t of the band Nand flange o of band P, and any steamgenerated in the lower part of the casingA will pass up out through theequalizing-pipe O and pipe or passage B into the steam-space in the pot-B and mingle with the steam in said pot and pass out, together with thesteam from the shell G, into the just-described chamber and through theoutlet R, the said pipes B C serving to equalize the steam-pressure inthe device at all times. Any sediment in the bottom of pot B and shell Gcan be readily removed through the drain-cock M.

When it is desired to utilize my invention as a water-heater simply, thevalve-block S and valve T and their attachments and the equalizing-pipeO and water-gage A may be dispensed with, and, if desired, the describedannular band E increased in height, so as to provide an additionalnumber of turns to the continuous spiral coil i on said band. In suchcase, of course, the opening a in the outer wall a of the casing A wouldbe closed, as

well as the opening n in the top wall it of the.

annular band E, the latter then rising to the same height as that of theannular coil-shell O. In this arrangement the cold water may be admittedto either the lower part of the casing Aas, for example, at the point ofthe lower connection of the water-gage A, (shown in Fig. 1)or at anyconvenient point in the upper part of said casing A, such as the pointof the upper connection of said water-gage, and in the latter case thedescribed pipe B would not be used; but as these changes are simplematters of pipe connections within the skill of the mechanic I have notdeemed it necessary to illustrate the same in the drawings. The water,whether ad mitted below or above the annular band E, would pass aroundall of the described coils in the casing A, pot, B, and shell G andbecome highly heated and would all'enter the chamber beneath the dome Qand pass out through the outlet R and be led by proper piping to thedesired point, the continuous flat spiral water-channels between theturns of the continuous spiral coils resulting in atfording large areasof heated surfaces of the casing A, pot B, and shell G, over which thewater moves from its entrance to its exit,

thereby heating the same with great economy of both time and fuel.

. Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is i Y 1. The combination with a double-walledannular outer casing having an annular band provided with a continuousspiral coil secured therein, of a double-walled annular water-potsecured within said casing; a double-walled annular shell secured withinand between the double walls of said pot, and provided with continuousspiral coils on the exterior surface of each wall forming fluid-tightjoints between said double-walled pot and said annular shell; asingle-walled shell supported within the central space of said annularpot,

and provided with a continuous inner spiral coil; a water-inletcommunicating with sald outer casing; pipes connecting saidannular potwith the outer casing and with the central shell; a chamber aboveandcommunieating with said annular pot and central shell,

and an outlet leading from the upper wall of said chamber. a i p 2. Thecombination with a double-walled annular outer casing, formed withacylindrical outer wall, an inclined inner wall and closed top andbottom walls, and having an annular band provided with a continuousspiral coil secured therein, and a water-inlet comm unicatingtherewith,of a conical double walled annular water-pot securedwithinsaid casing and connected thereto by a lower communicatingwater-pipe; a double-walled conical annular shell secured within andbetween each wall forming fluid-tight joints betweensaid double-walledpot and said annular shell; a single-walled shell having an open top andclosed bottom supported within the central space of said annular pot andprovided witha continuous inner spiral coil, and a pipe connecting thelower end of said central shell with said annular pot; an annular domeclosing the top of said annular pot and provided with openings; a cup orannular band having openings communicating with those in said annulardome and with the open top of the said central shell; a dome connectedto said cup or annular band, forming therewith a fluid-chamber, andprovided with an outlet; and another annular band,rising from saidannular casing and surrounding said first-named annular band, butseparated therefrom by an annular hot-air passage.

3. The combination with a double-walled closed outer casing having itslower part shut I off from its upper part by the upper end of acontinuous spiral coil secured therein, of a water-pot secured withinsaid casing have ing a closed top and containing a close-bot tomed shelllocated in said pot, andzpro vided with a continuous spiral coil makingfluid-tight joints with the said pot; a pipe connecting saidouter-casing with said pot IIO abovethe top of the said coil-shelhaud'another pipe connecting said outer casiug'and said pot below the bottomof said coil-shell; A a valve-block having three parallel verticalwater-channels therein free fronrdir'ect'communication with each other,and one of said 011' "nels communicating with the interior of .outercasing above the top of thecoil therein; a rocking valve pivotallysecured to said Valve-block and having a water-chamber adapted,. as saidvalve is rocked, to connect the central water-channel in said'blockwith'the channel on one or the other side of said'central channel; arock-shaft having at itsouter end a rigid arm in engagement withsaidrocking valve, and having its inner end I projecting within said outercasing; afloat rigidly secured to said inner end of the rockshaft;water-inlet and water-escape pipes eX- terior to saidouter casing andcommunicating with two of the said three channels in the valve-block; anequalizing-pipe located within said outer casing, and extending from thelower shut-off part to a point above the high-water line; a closedchamber located above said water-pot, and having openings in its lowerwall in communication with corresponding openings in the closedtop ofsaid water-pot; and an outlet leading from said chamber.

4.The combination with a double-walled annular outer casing having anannular band provided with acontinuous spiral coil secured therein,theupper end of said coil shutting off the lower part of said casing fromits upper part, of a double-walled annular water pot secured within saidcasing; a doublewalled annular shell securediwithinjand between "thedouble walls of said potand pro videdwith continuous spiral coils on theexterior surface of each wall forming fluid-tight joints between saiddouble-walled pot and shell; a single-walled'shell supported within thecentral space of said annular pot, and provided with a continuous innerspiral coil,

:and'having' an open top and closed bottom;

an annular dome closing the top of said pot and provided with a' seriesof openings; a

closed chamber located above said water-pot and having an outlet leadingfrom its upper wall and openings in its lower wallcommunieating withthose in said annular dome and with the open top of the saidsingle-walled central shell; a water-inlet communicating with the upperpart of said outer casing; an

exterior valve controlling said inlet, and an have hereunto set my hand,at Milwaukee, in

the county of Milwaukee and State of Wisconsin, in the presence of twowitnesses.

EMANUEL DETWVILER.

itnesses:

H. G. UNDERWOOD, B. O. ROLOFF.

